Albrecht heil



No. 607,590.- Patented My 19, I898.

A. HEIL.

GALVANIC CELL. (Application filed Dec. 1, 1897.)

(No Model.)

WZZnewem- [raven/Z02 {thus takes place in the cells, which. is not the UNITED STATES Fries.-

GAL-VANIC CELL.

SPECIFICATION forming pm of Letters Patent 'No;

1897. Serial No. 660,430. (N0 model.)

Application filed December 1,

607,590, dated July-19, 1898.

To all whom it may concern:

Be it known that I, ALBRECHT HEIL, of Frz'inkisch'Orumbach, in the Grand Duchy of Hesse Darmstadt, in the German Empire, have invented a new and useful Improvement in Galvanic Cells, of which the following is a specification. I

The present invention' has for object to produce-a primary galvanic cell which will generate a constantcurrent of high'intensitywithout employment of arr-acid.- A cell embodying the said invention possesses the great advantage over other primary cells that it is not subject during rest to the 'inj urious influence of local action and-that the electrolyte is not materially altered during s'upply of current.

In the Leclanch pell, as is known, the am monium of the ammonium chlorid is substiuted by zinc during supply of current. Ammonia is formed, which escapes into the air, while in the case of the lead sulfuric-acid accumulator sulfate of lead is formed during rest by the action of the sulfuric acid upon the lead and its oxids. Inju'rious alteration case with the cell hereinafter described, with reference to the accompanying drawing, which represents a vertical section.

a is a carbon electrode inserted intoand surrounded'by a small bag 6, filled with a mixture Z2 of about equal parts in volumeof graphite, black oxidof manganese, (MnO and peroxid of lead, (1 This bag is closed around the electrode and affixed thereto bya string 6?. In this mixture thegraphite improvesjthe conductivity.

' The manganese peroxid is employed on account of its entirely neutral behavior and of its high capacity for absorption of the oxysawdust to a pulp,

gen in the solution and the lead peroxid on account of the increased intensity it gives to the cell.

c is the zinc. I I

d is the electrolyte solution contained. in the glassvessel e, in which the electrodes are placed. This electrolyte consists of an aqueous solution of zinc sulfate, to which sodium carbonate is addedin such'proportion that hydrate of -zinc is precipitated in the form of small flocks. In preparing said electrolyte I generally add' twenty (20) grams of sodium carbonatedissolv'ed in one (1) liter of water to every' fourflt) liters of a saturated solution of 'zinc sulfate. In order that these flocks exciting or positive electrode of of-hydrate'of zin hichimight either sink to the bottom orlfioat upon the solution, may remain permanently ed, the solution is stirred with gypsum and and the electrode manufactured as before described is then immersed therein. Zinc is employed as the positive electrode.

The cell thus composed has an intensity of 1.8 volts. t 4

A galvanic cell comprising a-carbon electrode surrounded by about equal parts by volume of graphite',.manganese peroxid and lead peroxid, azinc electrode and an absorbent filling holding an electrolyte of zinc sulfate containing flocks, ofhydrate of zinc evenly distributed throughout the mass of said electrolyte, substantially as described.

In testimony ence of two subscribing witnesses.

ALBRECHT IIEIL.

Witnesses:

JEAN GRUND, FRANK H. MASON.

and-regularly distribut exciting'or that I claim the foregoing as my invention I have signed my name in pres- 

